DE102016226125A1 - Starting device for internal combustion engines - Google Patents

Abstract

The device relates to a starting device (10) for internal combustion engines, with a Vorspuraktuator (16) having an axially displaceable armature (17), and a starter pinion (22) which is axially displaceable, and with a lever assembly (125) which on a location (137) is coupled to the armature (17) and at least at another location (134) at least indirectly coupled to the starter pinion (22), with a bearing point (140) on which the lever assembly (125) is rotatably mounted , comprising a biasing spring element (131) which is part of the lever assembly (125) and to which the armature (17) is coupled, and a lever part (128) which engages with one end on an output shaft (108), wherein the lever part (128) has a lower lever portion (129) between an axis of rotation (140) and the location (134), and an upper lever portion (130) between the rotation axis (140) and the location (137), a portion (148) of the Biasing spring element (131) between the H ebelteil (128) and a shield (151) is arranged, wherein the plate (151) a tab (190) is connected, so that a leg (132) of the biasing spring element (131) between the upper lever portion (130) and the tab (190) is arranged.

Description

State of the art

From the document DE 10 2011 003 200 A1 is a starting device for internal combustion engines is known, the lever assembly has a lever part which engages with one end to an output shaft, and a biasing spring element which is coupled to the armature of a Vorspuraktuators.

From the Japanese patent application JP 2001-295742 A is known a starting device having a fork lever. This fork lever is biased by a coil spring having a leg acting as a lever to which an engaging member of an armature of a toe-in actuator (engagement relay) engages.

From this publication, it is also known that the spring just mentioned is covered by a cover. On the basis of the disclosure, it is provided to increase the counteracting force acting upon actuation of this fork lever with a spring element against an engagement movement of the armature of the engagement relay.

Disclosure of the invention

The starting device for internal combustion engines with the features of claim 1 has the advantage that can be achieved by the development of the shield, according to which a tab is connected to this shield, so that a leg of the biasing member between the upper lever portion and the tab is arranged, that by applying the spring element or biasing spring element with the application of the biasing spring element when actuated by the engagement relay, the biasing force with the reaching of the biasing spring element of the tab and thus with the concern of the biasing spring element on the tab, the biasing force is increased. As a result, the lever element or the lever assembly is provided with a type of two-stage spring. Ie. Over a certain pivoting range of the biasing spring element, the counterforce of the biasing spring element acts on the engagement part of the engagement relay or Vorspuraktuators. After a certain pivoting range of this biasing spring element, as already mentioned, the tab is reached, which then executed in a second stage, preferably as a leaf spring, also applies a counterforce, so that overall the biasing force increases more with the achievement of the second stage. This ensures that in certain very unfavorable environmental conditions (high dynamics of the Vorspuraktuators or armature, the mass of Andrehritzels and high friction and high viscosity of the lubricant / grease in vorspurenden system or in the system preferably used steep-threaded coupling) the starting pinion only at higher acting on the armature counterforce of the biasing spring element or the combination of the two springs acts and so in the above unfavorable conditions, the armature of the Vorspuraktuators only later and d. H. preferably with the toads of Andrehritzels is moved further. By this preferred two-stage spring arrangement by a parallel-connected spring element (tab), which is switched after a certain path or pivoting of the biasing spring element, the spring force is preferably increased only when a so-called critical point is exceeded in the relay design. D. h., That after the pivoting of the biasing spring element to the point where it rests against the tab, the Vorspuraktuator and thus the iron circle, the required force on the sliding armature to safely turn the lever assembly even in adverse circumstances, and prefers to switch the so-called main flow only when the pinion on the ring gear of the internal combustion engine has arrived at least (tooth-on-tooth position).

According to a further embodiment of the invention, it is provided that in the idle state of the starting device between the tab and the leg of the biasing spring element, a distance is present. As a result, the additional resistance against rotation of the lever assembly only after a certain time or a certain angle of rotation of the upper lever part is effective, so that up to this point or this associated pivoting angle, a particularly high traction excess remains. The result is that the inertia or the pulse of the armature of Vorspuraktuators is rather high and thus there is the certainty that the aforementioned critical point is exceeded in the design and thus the armature safely closes the magnetic circuit. In particular, it is provided that, when the lever assembly is deflected, the first limb rests against the lug with a bending point of the first limb. This ensures that any existing punching (burring) does not abrade the leg and thus abuts the tab on a rounding of the leg by the concerns of the bending point. By this measure, the life of the leg and thus of the biasing spring element is not reduced. According to a further embodiment of the invention it is provided that the first leg and the tab are arranged between cheeks of the lever part, which are integrally embodied with the lever part. This has the advantage that the first leg and the tab are arranged protected.

• 1 eine Schnittansicht der erfindungsgemäßen Antriebsvorrichtung,
• 2 einen Längsschnitt durch eine Hebelbaugruppe gemäß einem ersten Ausführungsbeispiel,
• 3 einen Querschnitt durch den Gabelhebel mit Schild,
• 4 eine Explosionsdarstellung der Einzelteile der Hebelbaugruppe aus Hebelteil, Vorspannfederelement und Schild mit Lasche,
• 5 eine Längsschnittdarstellung der in 4 gezeigten und zusammengebauten Teile.

Show it:

• 1 a sectional view of the drive device according to the invention,
• 2 a longitudinal section through a lever assembly according to a first embodiment,
• 3 a cross section through the fork lever with shield,
• 4 an exploded view of the individual parts of the lever assembly of the lever part, biasing spring element and plate with tab,
• 5 a longitudinal sectional view of in 4 shown and assembled parts.

The representation according to 1 is a longitudinal section through a starting device 10 for an internal combustion engine refer. The starting device 10 For example, has a starter motor 13 and a Vorspuraktuator 16 on, in the example as a relay with a solenoid 17 is trained. The starter motor 13 and the electric Vorspuraktuator 16 are on a common drive end shield 19 attached. The starter motor 13 functionally serves to drive a starter pinion 22 when it is in a ring gear 25 one in 1 not shown internal combustion engine is eingespurt. The starter motor 13 Incidentally, it has the typical characteristics:

A pole tube carries on its inner circumference stator poles 31 holding an anchor 37 Surrounded (rotor). A drive shaft 44 of the anchor 37 carries on her to the andrehritzel 22 directed sun gear 80 , which three planet wheels 86 drives. The three planet gears 86 sit on journals 92 that with a driver 94 a freewheel 96 are rotatably connected. The planet wheels 86 roll on an inner circumference of a ring gear 99 from. A role federation 102 of the freewheel 96 is by means of clamp body 105 taken. The roller collar is here in this embodiment part of an output shaft 108 , which has a helical coupling 111 with the starter pinion 22 is coupled. To the freewheel 96 and the planetary gear 83 is a so-called intermediate storage 114 arranged, which centrally a bearing element 115 - executed here as a plain bearing - carries. By means of this bearing element 115 is the output shaft 108 in the interim storage 114 stored. With the interim storage 114 is integrally a support element 118 connected. This support element preferably has the task of opening in the drive end plate 19 to complete that the Vorspuraktuator 16 is facing. The opening 119 takes a neck 122 of the relay housing. A not here or only indirectly recognizable extended opening of the opening 119 towards the pole tube 28 is through the support element 118 at least partially closed. One in the direction of the connections of the Vorspuraktuators 19 directed end ends in a same plane as one at the upper end of the drive end shield 19 located area. The support element 118 and the drive end shield 19 offer at this point the housing of Vorspuraktuators 16 a flat, substantially round opening and at the same time a support plane. In the drive end shield 19 there is a lever assembly 125 , on the one hand a lever part 128 and on the other hand, a biasing spring element 131 having. The lever assembly 125 is here with the lever part 128 at one point 134 preferably directly with the starter pinion 22 coupled. The biasing spring element 131 is with the lever part 128 rotatably coupled. The spring or biasing spring element 131 essentially comprises two legs 132 . 133 (Leg spring) where a first leg 132 between an axis of rotation of the lever assembly and a location 137 on which the lever assembly 125 with the anchor 17 is coupled, is arranged. The second leg 133 the biasing spring element 131 extends between a rotation axis 140 the lever assembly and the point 134 on which the lever part 128 on the output shaft 108 intervenes 2 , The lever part 128 has a lower lever part 129 and an upper lever part 130 , The lower lever part 129 extends between the axis of rotation or bearing point 140 and the point 134 at which the lever assembly or the lever part 128 at least indirectly with the starter pinion 22 is coupled. The upper lever part 130 extends at least between the axis of rotation or bearing 140 and the place 137 at the thigh 132 the biasing spring element 131 in one of the possible operating states (idle state, Einspuren, Ausspuren) is present. Most likely, it is expected that the request will be at rest or when leaving. In the latter case, when the magnetic field of Vorspuraktuators 16 collapses and a force breaks anchor 17 to the thigh 132 suppressed.

2 shows a side view of the bearing 140 , Between the two legs is a spiral part 143 made of two spirals wound in opposite directions 144 and 145 consists, 3 , The two spirals 144 and 145 are clipped into a cavity of the lever member so that the biasing spring member 131 and the lever member 128 a preassembled lever assembly 125 form. An area 148 the biasing spring element 131 is between the lever part 128 and a sign 151 arranged.

It is therefore a starting device 10 disclosed for internal combustion engines, which has a Vorspuraktuator 16 having an axially displaceable armature 17 has, and the one Andrehritzel 22 has, which is axially displaceable. Furthermore, this starter has 10 a lever assembly 125 on which at one point 137 with the anchor 17 is coupled. At least one other place 134 the lever assembly is at least indirectly with the starter pinion 22 coupled. The starting device also has a storage location 140 on, on which the lever assembly 125 is rotatably mounted. A biasing spring element 131 is part of the lever assembly 125 , A biasing spring element, which is part of the lever assembly 125 is and at which the anchor 17 is coupled is also available. The lever part 128 engages at one end on an output shaft 108 one. An area 148 the biasing spring element 131 is between the lever part 128 and a shield 151 arranged. In addition, the shield 151 between the support element 118 and the area 148 the biasing spring element 131 arranged. The support element 118 can preferably be designed as a bearing block, which indirectly or directly the lever assembly 125 rotatably supports.

With regard to the material properties of the elements involved, it is provided that a sliding friction coefficient between the material of the area 148 the biasing spring element 131 and the support element 118 the biasing spring element 131 is greater than a coefficient of sliding friction between the material of the area 148 the biasing spring element 131 and the shield 151 ,

In 3 is a cross section along the line III-III as in 2 shown shown. Good to see are the two hooks 160 . 161 over the two holding arms 168 and 170 spread. Furthermore, the sign 151 to recognize in cross section. From this sign 151 go at one end and at the other end 163 and 166 one holding arm each 168 and 170 out. These retaining arms 168 and 170 each have a hole on 173 and 176, over the two hooks 160 , 161 are pushed. For simplified insertion or over the hooks 160 , 161 Push are the two holding arms 173 and 176 provided with tapered ends 178 and 180. The holding arms 168 and 170 take between them the two spiral parts 144 and 145 on. This is the area 148 between the two holding arms 168 and 170 added. The shield 151 is thus on the lever part 128 attached. In addition, the shield attacks 151 with the at least one holding arm 168 . 170 in a holding contour 183 - represented by the two hooks 160 . 161 - on the lever part 128 one.

In 4 is an exploded view showing the lever part 128 , the biasing spring element 131 and the shield 151 shows. As you can see here, the sign is 151 integral with the retaining arms 168 . 170 executed. This shield part 151 with the holding arms 168 and 170 is made of sheet metal. The shield 151 has here substantially the profile of a half approximately annular or circular pipe, from the bevels at the ends thereof 186 respectively. 187 out. These chamfers are used for the spirals 144 . 145 to grip around so that no edge rubs on the spirals.

The shield can be attached to the lever part 128 or the lever assembly 125 Alternatively, be secured by additional parts such as screws or bolts. Furthermore, the sign can 151 Also be secured by slit-like geometries in the lever member 128, wherein rectangular portions, which with the shield part or shield 151 are connected, are inserted into these slot-like geometries. It is good to see that the thigh 132 the biasing spring member 131 is a bending point 193 having.

It is thus a starting device 10 disclosed for internal combustion engines, with a Vorspuraktuator 16 , which is an axially displaceable anchor 17 has, and a starter 22 , which is axially displaceable, and with a lever assembly 125 which in one place 137 with the anchor 17 is coupled and at least one other place 134 at least indirectly coupled to the starter pinion 22, with a bearing point 140 on which the lever assembly 125 is rotatably mounted, with a biasing spring element 131 , which is part of the lever assembly 125 is and at which the anchor 17 coupled, and with a lever part 128 , which has one end to an output shaft 108 engages, wherein the lever part 128 a lower lever part 129 between a rotation axis 140 and the place 134 and an upper lever part 130 between the axis of rotation 140 and the place 137 , being an area 148 the biasing spring element 131 between the lever part 128 and a sign 151 is arranged, with the shield 151 a tab 190 is connected, so that a leg 132 of the biasing spring element 131 between the upper lever part 130 and the tab 190 is arranged.

From the shield part 151 Preferably the piece goes in one piece 190 out. Ie. from the approximately half annular or circular tube portion of the shield 151 the tab goes 190 in one piece. During this profile part of the shield 151 preferably over the entire width of the spirals 144 . 145 this covers, has the tab 190 a width that is preferably about one-third the width of the sign 151 equivalent. At this point it should also be mentioned that the width of the tab 190 ultimately also a question of voting. The wider the tab 190 , the greater the force that this tab 190 parallel to the bias spring element 131, in particular to the leg 132 developed. In the 5 is shown as in the idle state of the starting device 110 between the tab 190 and the thigh 132 a distance A is present. As further shown in the dashed line of the biasing spring element 131 is shown lies with deflected lever assembly 125 the first leg 132 at the flap 190 at. Particularly preferred is in this deflected position of the lever assembly 125 of the first leg 132 with a bending point 193 of the first thigh 132 at the flap 190 at. As in synopsis of 4 and the 5 is recognizable, it is provided that the first leg 132 and the tab 190 between cheeks 196 and 197 are arranged. These cheeks 196 and 197 are integral with the lever part 128 embodies. These cheeks are also in 3 recognizable. These cheeks 196 and 197 limit in rotational axial direction (direction of the axis of rotation 140 ) the already mentioned cavity in which the two spirals 144 and 145 are arranged. As from the synopsis of 3 and 4 is clear, it is preferably provided that these cheeks 196 and 197 in the rotational axial direction and in the direction of this axis of rotation in the direction to the point 137 to change so that the gap, as seen in the axial direction, is narrower or is. The gap or cavity tapers in the direction of the point 137 , The in 5 The arrow labeled F indicates that the force is being applied here, which is the anchor 17 on the upper thigh 132 when engaging or engaging applies. The other arrow labeled F _D indicates the force that holds the tab 190 applies.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011003200 A1 [0001]
• JP 2001295742 A [0002]

Claims (5)

Starting device (10) for internal combustion engines, comprising a Vorspuraktuator (16) having an axially displaceable armature (17), and a starter pinion (22) which is axially displaceable, and with a lever assembly (125) which at one point (137 ) is coupled to the armature (17) and is at least indirectly coupled to the starter pinion (22) at at least one other point (134), with a bearing point (140) on which the lever assembly (125) is rotatably mounted, with a biasing spring element (131), which is part of the lever assembly (125) and to which the armature (17) is coupled, and with a lever part (128) which engages with one end on an output shaft (108), wherein the lever part (128) lower lever part (129) between a rotation axis (140) and the point (134), and an upper lever part (130) between the rotation axis (140) and the point (137), wherein a portion (148) of the biasing spring element (131) between the lever part (128) and a Schil d (151), characterized in that a tab (190) is connected to the shield (151) such that a leg (132) of the biasing spring member (131) is interposed between the upper lever member (130) and the tab (190). is arranged. Starting device after Claim 1 , characterized in that in the resting state of the starting device (10) between the tab (190) and the leg (132), a distance (A) is present. Starting device after Claim 1 or 2 , characterized in that when deflected lever assembly (125) of the first leg (132) against the tab (190). Starting device after Claim 3 , characterized in that when deflected lever assembly (125) of the first leg (132) bears with a bending point (193) of the first leg (132) on the tab (190). Starting device according to one of Claims 1 to 4 characterized in that the first leg (132) and the tab (190) are disposed between cheeks (196, 197) integrally formed with the lever member (128).

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